Answer:
a) 2.5%
b) 6%
c) 3.5% 
Explanation:
The Formula to be used is the <em>habitat hypothesis </em>
as stated in the document attached below 
a)  it = 2%; it+1 =3%
 = 0 + ( 2 + 3 ) / 2
 = 0 + ( 2 + 3 ) / 2 
     = 2.5% ( two year nominal interest rate ) 
b) it = 2%;  it+1+1 = 10%
 = 0 + ( 2 + 10 ) / 2
 = 0 + ( 2 + 10 ) / 2
      = 6% ( two year nominal interest rate )
c) it = 2%;  1t+1 = 3%. ∝₂,t = 1%
 = 1 + ( 2 + 3 ) / 2
  = 1 + ( 2 + 3 ) / 2 
      = 1 + 2.5 = 3.5% 
 
        
             
        
        
        
Answer: Proven oil reserves 
Explanation:
Proven oil reserves are those that humans can extract oil from given our current technological and economic situations. 
Under Proven oil reserves there are those that are Proven developed and those that are Proven Underdeveloped. Proven Developed ones can be extracted from as they come from already existing wells. Proven Underdeveloped however would need further investment to get them ready. 
 
        
             
        
        
        
Answer: It always comes after the fact.
Explanation:
Feedback is very important for a company. It helps them know where they need to improve on so that they can offer better services ti customers. It also fosters good relations with customers as they will feel their input is taken into account. 
Unfortunately though the whole premise of Feedback is that it's based on information of an event that has already happened and SOMETIMES CANNOT BE CHANGED. This is a very huge drawback but one that is implicit in the process itself. 
 
        
             
        
        
        
Let x be the part of 19,000 that was loaned out at 6% such that the remaining 19,000 - x was loaned out at 14%. The interest is calculated by the equation,
    I = P x i x n
where P is the principal amount, i is the interest, n is the number of years. Substituting the known values,
   2000 = (x)(0.06) + (19000 - x)(0.14)
The value of x from the equation above is 8250.
Hence, 8,250 was loaned out at 6%.